Edward f



(No Model.)

E. P. GORDON .8v H. HORBS.

STEAM RADIATOR.

' UNITEDv STATES PATENT OFFICE;

EDWARD Ii. GORDON AND HORA'IIO HOBBs, on CONCORD, N. H.

STEAM-RADIATOR.

SPECIFICATION forming part of Letters Patent No. 271,330, dated January L30, 1883.

Application tiled October' 6, 1882. (No model.)

To all whom it may concern Be it known that we, EDWARD F. GORDON and HORATIO HOBRs, citizens of the United States, residing at Concord, in the county of provement upon that described in the patent,

No. 227,517, granted May ll, 1880, to Edward F. Gordon, assignor to Horatio Hobbs, in-

which is set forth a radiatortube made of two sheetmetal shells arranged one within the other, and united by clamping together the projecting flanges of such shells. Under that arrangement the steam was received in the annular or crescent-shaped space between the tivo, and heat was radiated from the exterior of the larger shell and the interior of the smaller one, heating (in the latter case) the column ot' air rising through the inner shell.

Our improvement omits the inner shell with its radiating-surface, and employs a simple tlanged sheet-metal tube, its entire interior being occupied as a steam chamber or channel, two of such tubes being in practice united at their anges by clamping plates and bolts, which cause the sheet-metal tubes to closely hug the projecting collars of the baseaud caps which connect the tubes at bottom and top, an'd with them form a continuous conduit or open' space for the circulation ot the steam. This cheapens and simplifies the apparatus materially, and much less diilculty is experienced in making' steam-tightjoints. Furthermore, with a given volume of steam we can employ much smaller tubes, since there is no interior shell with an air-space within it.

The peculiarities ot' the present invention will be readily seen in the drawings, Figure l representing a radiator partly in elevation and partly in vertical section, while Fig. 2 is a transverse section atx fr, and Fig. 3 a detail in perspective.

In the drawings, A is the base-ahollow metallic casting-upon which two or more of the hanged sheetgmetal tubes, B, are erected, each embracing an annular upturned collar, C, cast in one with the base. The base is of sufficient dimensions to support the desired number Iof tubes arranged in pairs for circulation of the steam through them. Theftwo tubes of each l pair, rising from the base, as stated, are connected at the top by a hollow cap, E, preferably ot` cast-iron, provided with downwardlyprojecting collars F, each of which is em braced by the upper end ot one of the tubes, B. Such caps therefore serve as return-bends to connect one tube with the other, and to form with them and the base a continuous channel or connected steam-space for the steam, which is admitted at one end ot' the base and findsan ,exit at the other end, ordinarily. The tubes B B are until joined to each other mere shells with outwardly-extending anges G at their edges. (See Fig. 3.) .These edges are not turned back, hooked together, and hammered down,like stove-pipe; but, as seen in Fig. 2, the flange-edges ofthe two tubes are turned toward each other and caused to abut, or nearly so, with their flanges G extending along the same vertical plane, and are then ldrawn laterally together and held in close contact by clamping-bars H each side of the llanges, and secured by screws, bolts, or rivets. These clamp screws or bolts will usually pass between the edges of the anges G of two adjacent tubes where separated, notched, or slotted for the purpose. The tightening of the clamp-bars serves to draw the sheet-metal tubes closely about the collars of the base and caps, as well as to bring the anges G into close lateral contact, thus uniting all the parts in a most perfect manner and forming steam-tight joints. The hug7 ofthe sheet metal around the annular collars is so powerful as to render unnecessary any connecting-bolts from cap to base, which were required in the patented radiator referred to.

' We claim as our invention- Tile hollow base A and caps E, formed with projecting annular collars, as shown, and the hanged sheetmetal shells B, arranged in pairs side by side, external to each other and .to said collars, in combination with clamps adapted to bring said flanges into close lateral contact and to cause said shells to tightly hug` the collars of both base and cap, substantially as set forth.

In testimony whereof we hereto affix our signatures in presence of two witnesses.,

RD WARD n. GORDON. HORATIO Hoses.

IOO 

